Recently John showed how to create half-circle gauges and now I am glad to announce that RadGauge, both WPF and Silverlight, supports half-circle and quarter-circle styles out of the box. All you need to do is provide the correct resource through a ResourceDictionary and then use the corresponding style. The styles are named after the major geographical directions -- North, East, South and West, well we only use the first letters here - N, E, S and W. So the styles you need are <Theme>RadialGaugeHalfCircle<Direction>Style and <Theme>RadialScaleHalfCircle<Direction>Style. Check the following example - semi-circular, south-directed vista-styled gauge: